ISBN: 9787502043667 - 复杂结构薄煤层综采与矿山压力 【正版书籍】 (1 resultados)

paperback. Condición: New. Paperback. Pub Date :2014-01-01 Pages: 198 Language: Chinese Publisher: Coal Industry Press for tuberculosis and iron sulphide thin seam partings hard to achieve the core of fully mechanized coal mines use pressure flaking broken coal and tuberculosis . Thin Seam Mining complex structure with underground pressure in-depth and systematic introduction to the Thin Seam coal mining face underground pressure and wall damage law. the use of pressure mines reasonable supporting strength and cutting .…